Daikin WGZ030DW- Manuals

Page 2 - Table of Contents; Products manufactured in an; ISO Certified; facility

2 OMM 1130 - 2 Table of Contents Introduction ....................................... 3 General Description .............................. 3 Nomenclature ........................................ 3 Water Pressure Drop ............................. 3 Components ...........................................

Page 3 - Introduction; General Description; Daikin; NOTE; Nomenclature

OMM 1130 - 2 3 Introduction General Description Daikin Type WGZ water chillers are designed for indoor installations Equipment room temperature for operating and standby conditions is 40°F to 122°F (4.4°C to 50°C). They are available with water-cooled condensers (Model DW), or arranged for use with ...

Page 4 - Figure 1, Evaporator Pressure Drop, WGZ030D – WGZ200D

4 WGZ030D through WGZ200D OMM 1130 - 2 Figure 1, Evaporator Pressure Drop, WGZ030D – WGZ200D GPM Ft L/S kPa GPM Ft L/S kPa GPM Ft L/S kPa W GZ030D A 56.3 2.6 3.5 7.7 90.0 6.3 5.6 18.8 150.0 16.6 9.4 49.7 W GZ035D B 64.9 3.6 4.1 10.8 103.8 8.8 6.5 26.3 173.0 23.2 10.8 69.4 W GZ040D C 76.3 2.9 4.8 8.6...

Page 5 - Figure 2, Condenser Pressure Drop, WGZ030D – WGZ200D

OMM 1130 - 2 5 Figure 2, Condenser Pressure Drop, WGZ030D – WGZ200D Unit Model Ref # Min. Flow & PD Nom. Flow & PD Max. Flow & PD IP SI IP SI IP SI GPM Ft. L/S kPa GPM Ft. L/S kPa GPM Ft. L/S kPa WGZ030D A 56.1 2.4 3.5 7.2 89.7 6.3 5.7 18.8 149.5 17.4 9.4 52.0 WGZ035D B 64.9 3.4 4.1 10.2...

Page 6 - Components; Figure 3, Compressor Locations

6 WGZ030D through WGZ200D OMM 1130 - 2 Components Figure 3, Compressor Locations NOTE: Models WGZ150 to WGZ200 add a #5 compressor to circuit #1 and a #6 compressor to circuit #2. 4 2 3 1 Circuit 2 Circuit 1 Control Panel Evaporator Evaporator andCondenserConnections

Page 7 - Unit Configuration; electronic expansion valves.

OMM 1130 - 2 7 Unit Configuration The chiller units have two refrigerant circuits, Models WGZ 030 to WGZ 130 have two tandem scroll compressors (total of four), a single two-circuited brazed plate evaporator, a single two-circuited water-cooled condenser, interconnecting refrigerant piping and a con...

Page 8 - Field Wiring Diagrams; Figure 5, WGZ030DW – WGZ200DW Field Wiring Diagram (Packaged Unit)

8 WGZ030D through WGZ200D OMM 1130 - 2 Field Wiring Diagrams Figure 5, WGZ030DW – WGZ200DW Field Wiring Diagram (Packaged Unit)

Page 10 - Warning

10 WGZ030D through WGZ200D OMM 1130 - 2 Control Panel Layout Table 1, Typical Control Panel, 4-Compressor Unit NOTES: 1. Additional space provided in the upper right section for optional multiple point power connection and optional circuit breakers. 2. Front door has a slot opening at the top for ac...

Page 11 - Start-Up and Shutdown

OMM 1130 - 2 11 Start-Up and Shutdown Pre Start-up 1. The chilled-water system should be flushed and cleaned. Proper water treatment is required to prevent corrosion and organic growth. 2. With main disconnect open, check all electrical connections in control panel and starter to be sure they are ti...

Page 12 - Weekend or Temporary Shutdown; After; Start-up after Temporary Shutdown

12 WGZ030D through WGZ200D OMM 1130 - 2 12. Start the system by setting the system switch S1 to on. 13. After running the unit for a short time, check the oil level in each compressor crankcase, rotation of condenser fans (if any), and check for flashing in the refrigerant sight glass. 14. After sys...

Page 13 - CAUTION; Sequence of Operation; Compressor Heaters; When compressors start and stop; least one compressor on the unit has started and is running.

OMM 1130 - 2 13 11. Check that the MicroTech II controller is set to the desired chilled water temperature. 12. Check resets of all equipment protection controls. 13. Switch the unit circuit breakers to “on.” 14. Start the system by setting the system switch S1 to “on.” CAUTION Most relays and termi...

Page 15 - Manual Compressor Disable Logic

OMM 1130 - 2 15 When staging down, one compressor on each circuit will be left on until each circuit has only one compressor running. In other words, the compressor, on either circuit, with the most run-hours will stop first. The compressor with the most run-hours on the other circuit will stop next...

Page 17 - MicroTech II Controller; Controller Software Version; Operator Friendly; Enables unit operation from local keypad or digital input; Unit Mode Selection; Selects standard cooling, ice, glycol, or test operation mode

OMM 1130 - 2 17 MicroTech II Controller Controller Software Version This manual is based on software version WGZD20102F. The “02F” is the version descriptor. The version installed in a unit can be viewed by pressing the MENU and ENTER keys simultaneously, then pressing MENU to return to the regular ...

Page 18 - ALARM

18 WGZ030D through WGZ200D OMM 1130 - 2 Keypad/Display A 4-line by 20-character/line liquid crystal display and 6-key keypad is mounted on the unit controller. Its layout is shown below. Figure 8, Keypad and Display in MENU Mode The four arrow keys (UP, DOWN, LEFT, RIGHT) have three modes of use. Sc...

Page 19 - Table 4, Analog Outputs; Table 5, Digital Inputs; Table 6, Digital Outputs

OMM 1130 - 2 19 Table 4, Analog Outputs # Description Output Signal Range 1 Cooling Tower Bypass Valve Position 0 to 10 VDC 0 to 100% Open 2 Cooling Tower VFD Speed 0 to 10 VDC 0 to 100% 3 Circuit #1 Electronic Expansion Valve 0 to 10 VDC 0 to 100% 4 Circuit #2 Electronic Expansion Valve 0 to 10 VDC...

Page 20 - Expansion I/O Controller; Digital Outputs

20 WGZ030D through WGZ200D OMM 1130 - 2 Table 6, Continued # Description Type Load Output OFF Output ON 5 Motor Control Relay #3 = Compr#3 C1 Starter Compressor OFF Compressor ON *6 Condenser Fan #3– Water Cooled =N /Tower Fan #2-Water Cooled=Y C1 / UT Fan Contactor Fan OFF Fan ON *6 Motor Control R...

Page 21 - Setpoints; Default; adjusted to any value in the; Range; The; PW; Passwords are as follows:

OMM 1130 - 2 21 Setpoints The following parameters are remembered during power off, are factory set to the Default value, and can be adjusted to any value in the Range column. The PW (password) column indicates the password level that must be active in order to change the setpoint. Passwords are as ...

Page 23 - Automatic Adjusted Limits; 00 psi for air cooled for air-cooled applications.

OMM 1130 - 2 23 Automatic Adjusted Limits The following are set points that will be limited based on the option selected. Evaporator Leaving Water Temperature Mode Refrigerant Type Range Unit Mode = Cool R134a, R410A 40 to 60 ° F Unit Mode = Cool w/Glycol R134a 20 to 60 ° F Unit Mode = Cool w/Glycol...

Page 24 - Dynamic Defaults; Refrigerant Dependent Defaults; Number of Fans Dependent Defaults; Unit Stop Alarms; Evaporator Flow Loss

24 WGZ030D through WGZ200D OMM 1130 - 2 Dynamic Defaults Some set points will have a particular default value loaded when another setting is changed. Refrigerant Dependent Defaults Set Point Refrigerant Type R134a R410A Low Evaporator Pressure Hold 29 psi 101 psi Low Evaporator Pressure Unload 28 ps...

Page 25 - Low Evaporator Pressure; Freeze error

OMM 1130 - 2 25 When the alarm occurs due to this trigger, it can auto reset the first two times each day, with the third occurrence being manual reset. For the auto-reset occurrences, the alarm will reset automatically when the evaporator state is Run again. This means the alarm stays active while ...

Page 28 - Limit Events; Low Evaporator Pressure - Hold

28 WGZ030D through WGZ200D OMM 1130 - 2 Alarm Log An alarm log stores the last 25 alarms and/or events to occur. When an alarm or event occurs, it is put into the first slot in the alarm log and all others are moved down one, dropping the last entry. In the alarm log, the date and time the alarm occ...

Page 29 - High Condenser Pressure - Unload; Failed Pumpdown

OMM 1130 - 2 29 High Condenser Pressure - Unload Event description (as shown on screen): CondPressHighUnloadN Trigger: This event is triggered if all of the following are true: • circuit state = Run • more than one compressor is running on the circuit • condenser pressure > High Condenser Pressur...

Page 31 - Controller Operation; Calculations; In cooling mode; Six compressor units; In heating mode; Four compressor units; If the Unit mode is Cool:

OMM 1130 - 2 31 Controller Operation Calculations The Control Band defines the temperatures around the Controlling Leaving Water Temperature set point where compressors will be staged on or off. In cool mode, the controlling leaving water temperature set point will be Evap LWT. In heat mode, the con...

Page 32 - The Stage Down temperature is calculated as:; Cooling Mode

32 WGZ030D through WGZ200D OMM 1130 - 2 The Stage Down temperature is calculated as: Stage Down Temperature = Heat LWT + (Control Band/2) The Heat Start up and Shutdown temperatures are calculated from the Control Band. The Start Up temperature determines when the first compressor on the unit will s...

Page 33 - Heating Mode

OMM 1130 - 2 33 Parameters used: 1. Heating Leaving Water Temperature set point (Heat LWT)2. Heating Maximum Reset set point (Htg MaxRes)3. LWT Reset signal 4-20mA Reset is 0ºF and the active leaving water set point is equal to the Heat LWT set point if the reset signal is less than or equal to 4 mA...

Page 34 - Active LWT Set Point; LWT error = LWT – active LWT set point; LWT Slope

34 WGZ030D through WGZ200D OMM 1130 - 2 Heating Mode Return Reset Heat LWT set point Htg MaxRes set point Heat LWT (–) Htg MaxRes Htg StrtResDT setpoint (range of reset action) Condenser Delta Temperature (140ºF) (10ºF) (130ºF) 0ºF ‘Active’ Heat LWT Set Point The active heating leaving water set poi...

Page 35 - Evaporator Approach = LWT – Evaporator Saturated Temperature

OMM 1130 - 2 35 Evaporator Saturated Temperature Evaporator saturated temperature is calculated from the evaporator pressure for each circuit. R410a Evaporator Saturated Temperatures When R410a refrigerant is selected the refrigerant pressure will be fitted to a curve made up of 24 straight-line seg...

Page 36 - Manager password active.; Circuit Available

36 WGZ030D through WGZ200D OMM 1130 - 2 Changing the Unit Enable Set Point is accomplished according to the following table. NOTE: An “x” indicates that the value is ignored. Unit Off Input Control Source Set Point Remote Input Key- pad Entry BAS Request Unit Enable OFF X x x x OFF x SWITCHES OFF x ...

Page 38 - Evaporator Water Pump State Control (Evap State)

38 WGZ030D through WGZ200D OMM 1130 - 2 Off Pumpdown Auto T1 T4 T3 T2 Power On Unit State Diagram Evaporator Water Pump State Control (Evap State) The state-transition diagram shown below controls operation of the evaporator pump. Off Run Start Unit State=Auto OREvap Water Freeze Alarm Unit State = ...

Page 39 - Primary/Standby Pump Staging; Auto Control; Evaporator Water Flow Loss; and 6-Fan Remote Condenser

OMM 1130 - 2 39 Primary/Standby Pump Staging The pump designated as primary will start first. If the evaporator state is start for a time greater than the recirculate timeout set point and there is no flow, then the primary pump will shut off and the standby pump will start. When the evaporator is i...

Page 40 - There are four Stage Down dead bands, one for each stage.

40 WGZ030D through WGZ200D OMM 1130 - 2 8-Fan Remote Condenser, R22, R407C Stage Fans Operating on Circuit 1 Fans Operating on Circuit 2 1 Fan 1 Fan 2 2 Fans 1, 3 Fans 2, 4 3 Fans 1, 3, 5 Fans 2, 6, 8 4 Fans 1, 3, 5, 7 Fans 2, 4, 6, 8 8-Fan Remote Condenser, R410A Stage Fans Operating on Circuit 1 F...

Page 41 - Forced Fan Stage at Start; Up to four fans may be forced on when the compressor starts.; Condenser Pump and Tower Control – Water Cooled; Off; Pump Selection

OMM 1130 - 2 41 When stage down occurs or the saturated temperature rises back within the Stage Down dead band the Stage Down Error Accumulator is reset to zero. Forced Fan Stage at Start Fans may be started simultaneously with the compressor based on outdoor ambient temperature. When the compressor...

Page 43 - Operation After Start

OMM 1130 - 2 43 Additional stages can turn on (up to the number specified by the Tower Stages set point) when above conditions are met for the next stage plus the following condition: VFD Speed is > the Stage Up @ set point (only if Valve/VFD Control set point = VFD Stage OR Valve SP/VFD Stage) D...

Page 44 - Valve Stage Mode; Cooling Tower Fan VFD; flag is set based on the following tests:; Stage Up Now

44 WGZ030D through WGZ200D OMM 1130 - 2 Valve Stage Mode This mode is only operational when the Valve/VFD Control set point is set to Valve Stage. In this mode the valve output is controlled as for Valve Set Point mode (above) except that the active set point for the controlled parameter is selected...

Page 45 - Stage Down Now; Compressor Sequencing; F when the

OMM 1130 - 2 45 Stage Down Now The Stage Down Now flag is set based on the following tests: If Unit Mode = Cool AND LWT error < -0.5 * Control band AND More than one compressor running AND Stage down timer expired THEN Stage Down Now = True If Unit Mode = Cool AND LWT error < (-0.5 * Control b...

Page 46 - High Condenser Pressure – Unload Logic

46 WGZ030D through WGZ200D OMM 1130 - 2 compressor will shutdown if the evaporator pressure gets down to 5.0 psi. For R410a, the absolute limit for low evaporator pressure is 20.0 psi. When the Low OAT Start Timer has expired, if the evaporator pressure is greater than or equal to the Low Evaporator...

Page 47 - Example of Operation:; Unit Capacity Overrides; Any signal less than 4 mA does not limit the chiller capacity.

OMM 1130 - 2 47 Hold Clear Reset Value = High Pressure Unload set point – [“Initial Offset” + [“Step-Increase” x [“number of occurrence”-1]]] Initial Offset & Step Increase Condenser Configuration No. of Compressors R410A R22, R407C R134a Step Increase Water-Cooled 4 40 psi 30 psi 30 psi 10 psi ...

Page 48 - Unit State = Pump Down

48 WGZ030D through WGZ200D OMM 1130 - 2 Network Limit The maximum unit capacity can be limited by a network signal. This function is only enabled if the unit control source is set to network. The maximum unit capacity stage is based on the network limit value received from the BAS, and is determined...

Page 49 - Unit mode = Ice AND the ice set point is reached; Pump Down Procedure; EXV Control; F. PID logic will be used to; EXV Control Range

OMM 1130 - 2 49 • A normal stage down occurs, and only one compressor on the circuit is running • Unit mode = Ice AND the ice set point is reached Pump Down Procedure • If both compressors are running, shut off the appropriate compressor based on sequencing logic • With one compressor left running, ...

Page 51 - Using the Controller; Getting Started; After pressing the MENU button, the top-level menu screen will show:; VIEW EVAP

OMM 1130 - 2 51 Using the Controller Getting Started There are two basic procedures to learn in order to utilize the MicroTech II controller: • Navigating through the menu matrix to reach a desired menu screen and knowing where a particularscreen is located. • Knowing what is contained in a menu scr...

Page 52 - Figure 9, Display in the Shortcut (SCROLL) Mode and Keypad Layout; ENTER Key; Menu Screens; view

52 WGZ030D through WGZ200D OMM 1130 - 2 Figure 9, Display in the Shortcut (SCROLL) Mode and Keypad Layout ENTER Key Pressing the ENTER key changes the function of the ARROW keys to the editing function as shown below: LEFT key Default, changes a value to the factory-set default value. RIGHT key Canc...

Page 53 - Figure 10, Menu Matrix; (Right side of matrix continued from above); Menu Descriptions; Screen Definitions – MENU; Continued

OMM 1130 - 2 53 Figure 10, Menu Matrix “ MENU ” “ VIEW ” MENUS UNIT CIRCUITS REFRIGERANT FANS EVENTS VIEW UNIT STATUS (1) VIEW UNIT TEMP (1) VIEW CIRC #1 STATUS (1) VIEW CIRC #2 STATUS (1) VIEW REFRIGERANT CIRCUIT #1 (1) VIEW REFRIGERANT CIRCUIT #2 (1) VIEW FAN/TOWER (1) VIEW EVENT (1) VIEW UNIT STA...

Page 55 - View Unit Tempertures; WGZ unit

OMM 1130 - 2 55 This menu gives the status of digital inputs (D.I.), 1=ON, 0=OFF. Numbers are 1 through 18. See Table 5 on page 19 for number reference. VIEW UNIT STATUS (6) Analog Output(volts x 100) 1 = 000.0 2 = 000.0 VIEW UNIT STATUS (7) Analog Output(volts x 100) 3 = 000.0 4 = 000.0 VIEW UNIT S...

Page 56 - View Circuit

56 WGZ030D through WGZ200D OMM 1130 - 2 VIEW UNIT TEMP (3)Control Temps Start Up XX.X ° F Stage Up XX.X ° F VIEW UNIT TEMP (4)Control Temps Stage Down XX.X ° F Shut Down XX.X ° F TGZ Unit Only in Cool Mode TGZ Unit Only in Heat Mode VIEW UNIT TEMP (5) VIEW UNIT TEMP (5) Cond LWT XX.X ° F Cond LWT XX...

Page 59 - OR

OMM 1130 - 2 59 Water Cooled = Y Only or TGZ Unit (R134a) VIEW TOWER (2) Bypass Valve = XXX% VFD Speed = XXX% The Bypass Valve value shall be “None” (in place of XXX%) if the Valve/VFD Control setpoint = None or VFD Stage. The VFD Speed value shall be “None” if the Valve/VFD Control setpoint = None,...

Page 60 - allows; Set w/Unit Switch Off

60 WGZ030D through WGZ200D OMM 1130 - 2 Screen Definitions – EVENT LOG EVENT LOG (X)Event DescriptionTime Date Screen Definitions – SET Set Unit Setpoints SET UNIT SPs (1)Unit Enable = OFF Unit Mode = COOL Source = KEYPAD Unit Enable settings can be OFF and ON as determined from the Unit Enable setp...

Page 61 - See page 13 for an explanation of compressor staging.; WGZ Units Only; is used for units with remote condensers, usually air cooled.; CLOCK

OMM 1130 - 2 61 SET UNIT SPs (4) Start Delta= XX.X ° F Stop Delta= XX.X ° F Demand Limit = ON See page 13 for an explanation of compressor staging. WGZ Units Only TGZ Units Only (R134a) SET UNIT SPs (5) Max Pulldn=X.X ° F/min Evap Recirc= XXX sec Evap Pump = #1 Only SET UNIT SPs (5) Max Pulldn=X.X °...

Page 63 - stopped

OMM 1130 - 2 63 WGZ Unit (R22,R407C,R410A) TGZ Unit (Refrig = 134a) SET UNIT SPs (17) SET UNIT SPs (17) ENTER PASSWORD: XXXX Clg ResType = X Active Password Clg MaxRes = XX.X º F Level: None Clg StrtRes = XX.X º F TGZ Unit in Cooling Mode . TGZ Unit in Heat Mode. SET UNIT SPs (17) SET UNIT SPs (17) ...

Page 64 - Enable screens #3 and #4 require the manager password to change.; Expansion Valve; E x p a n s i o n Va l v e Ty p e = E l e c t r o n i c

64 WGZ030D through WGZ200D OMM 1130 - 2 # of Compressors = 4 # of Compressors = 6 SET COMP SPs (3) SET COMP SPs (3) Comp 1 = Enable Comp 1 = Enable Comp 3 = Enable Comp 3 = EnableComp 5 = Enable # of Compressors = 4 # of Compressors = 6 SET COMP SPs (4) SET COMP SPs (4) Comp 2 = Enable Comp 2 = Enab...

Page 65 - CondFlowProof= XX sec; TGZ in Heat Mode

OMM 1130 - 2 65 The last action to take place is the shutoff of all compressors running when the LowEvPrStop setting is reached (default is 58 psi). Reducing these time intervals will increase detrimental compressor cycling. It is recommended that these settings not be changed. SET ALARM LMTS (2) Hi...

Page 67 - XXX XXX; Wa t e r - c o o l e d O n

OMM 1130 - 2 67 Bypass valve position is > the Stage Up @ setpoint (only if Valve/VFD Control setpoint = Valve Stage) Additional stages can turn on (up to the number specified by the Tower Stages setpoint) when above conditions are met for the next stage plus the following condition: VFD Speed is...

Page 68 - Initial Valve Position

68 WGZ030D through WGZ200D OMM 1130 - 2 Wa t e r - c o o l e d = Y SET TOWER SPs (4) Valve/VFD Control= ValveSP/VFDStage Valve Type=NC to Twr Valve/VFD Control settings are None, Valve Setpoint, Valve Stage, VFD Stage, or ValveSP/VFDStage. Default is None which results in no control of the tower fro...

Page 69 - Figure 11, Initial Valve Position; Defaults are 25 for both error and slope.

OMM 1130 - 2 69 Figure 11, Initial Valve Position Operation After Start When the condenser pump is in the RUN state, the valve output shall be controlled in one of two modes as specified by the Valve/VFD Control setpoint. The controlled parameter shall be the condenser entering water temperature. Wh...

Page 70 - Set value to original factory setting.

70 WGZ030D through WGZ200D OMM 1130 - 2 TEST The test screens are only available when the unit is in TEST mode. Using these screens, any digital output can be controlled manually. R 2 2 , R 4 0 7 C R 4 1 0 A TEST UNIT (1) TEST UNIT (1) Alarm Signal =OFF Alarm Signal =OFF Evap Pump 1 = OFF Evap Pump ...

Page 72 - BAS Interface; Protocols Supported

72 WGZ030D through WGZ200D OMM 1130 - 2 BAS Interface The BAS interface will use the supervisor port on the controller as a connection point. Protocols Supported The following building automation system (BAS) protocols are supported. It is possible to change the building automation interface without...

Page 73 - Table continued; Parameter Details; Units of Measure

OMM 1130 - 2 73 Table continued Type Index I/O Description LONworks BACnet Modbus I 11 O Active alarms 11 x x x I 12 O Active alarms 12 x x x I 13 O Active alarms 13 x x x I 14 O Active alarms 14 x x x I 15 O Active alarms 15 x x x I 16 O Active alarms 16 x x x I 17 I Network chiller mode set point ...

Page 74 - Any time the chiller is not in Ice mode, Cool mode will be assumed.

74 WGZ030D through WGZ200D OMM 1130 - 2 Chiller Mode Applies to Integer 17 and Integer 19. Network Chiller Mode Set Point and Active Chiller Mode use the same numbering scheme to represent ice mode or cool mode. The output representing the mode is shown below for each protocol. Mode LONworks BACnet ...

Page 75 - Other Digital Output Parameters; LonWorks

OMM 1130 - 2 75 setting is checked. If this is set low, then the defaults for BAS cool set point, network limit, unit enable, and unit mode will be loaded. If the setting is set high, then no defaults are loaded and the status of the BAS enable set point is restored to the original value. Other Digi...

Page 76 - Compressor Motor protection Module; High motor temperature

76 WGZ030D through WGZ200D OMM 1130 - 2 Compressor Motor protection Module The 20, 26, and 30 HP compressors are equipped with an module that provides protection against: • High motor temperature • High scroll temperature • Phase missing • Phase reversal • Low control circuit voltage The module also...

Page 78 - Optional Controls; cause of the problem.; Factory settings are as follows:

78 WGZ030D through WGZ200D OMM 1130 - 2 Optional Controls Phase/Voltage Monitor (Optional) The phase/voltage monitor is a device that provides protection against three-phase electrical motor loss due to power failure conditions, phase loss, and phase reversal. Whenever any of these conditions occur,...

Page 79 - System Maintenance; General; Electrical Terminals; WARNING

OMM 1130 - 2 79 System Maintenance General To provide smooth operation at peak capacity and to avoid damage to package components, a program of periodic inspections should be set up and followed. The following items are intended as a guide to be used during inspection and must be combined with sound...

Page 80 - POE Lubrication; PO; Sightglass and Moisture Indicator; Ambient temperature is above 75; Crankcase Heaters; Copeland Ultra 32-3 MAF

80 WGZ030D through WGZ200D OMM 1130 - 2 POE Lubrication PO E type oil is used for compressor lubrication. This type of oil is extremely hygroscopic, which means it will quickly absorb moisture if exposed to air and may form acids that can be harmful to the chiller. Avoid prolonged exposure of POE oi...

Page 81 - Maintenance Schedule

OM 1130- 2 81 Maintenance Schedule I. Compressor A. Performance Evaluation (Log & Analysis) * O B. Motor • Meg. Windings X • Ampere Balance (within 10%) X • Terminal Check (tight connections, porcelain clean) X • Motor Cooling (check temperature) X C. Lubrication System • Oil Level O X • Oil App...

Page 82 - System Service; DANGER

82 OM 1130- 2 System Service DANGER Service on this equipment is to be performed only by qualified refrigeration personnel. Causes for repeated tripping of equipment protection controls must be investigated and corrected. Disconnect all power before doing any service inside the unit or serious perso...

Page 83 - Table 8, Thermostatic Expansion Valve; Water-cooled Condenser

OM 1130- 2 83 Table 8, Thermostatic Expansion Valve Note: Superheat will vary with compressor unloading, but should be approximately as follows: between 8°F and 12°F (4.4°C and 6.7°C) at full load; between 6°F and 10°F at part load. Water-cooled Condenser The condenser is of the shell-and-tube type ...

Page 84 - Troubleshooting Chart

84 OM 1130- 2 Troubleshooting Chart PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS Compressor Will Not Run 1. Main switch, circuit breakers open. 2. Fuse blown. 3. Thermal overloads tripped or fusesblown. 4. Defective contactor or coil. 5. System shut down by equipmentprotection devices. 6. No co...